Shavian vs booster

Shavian and booster both are nouns.

Word	Noun	Adjective	Verb	Adverb
Shavian	Yes	Yes	No	No
booster	Yes	No	No	No

As nouns, booster is a hypernym of Shavian; that is, booster is a word with a broader meaning than Shavian:

Other hypernyms of Shavian include admirer, champion, friend, protagonist, supporter.

Shavian (noun)	booster (noun)
an admirer of G. B. Shaw or his works	an additional dose that makes sure the first dose was effective
	the first stage of a multistage rocket
	an amplifier for restoring the strength of a transmitted signal
	a thief who steals goods that are in a store
	someone who is an active supporter and advocate
	a person who backs a politician or a team etc.

Shavian (adjective)	booster (adjective)
of or relating to George Bernard Shaw or his works